Don't refer to removed spans when reformulating pasted content.

third_party/WebKit/Source/core/editing/commands/ReplaceSelectionCommand.h

 /*
  * Copyright (C) 2005, 2006, 2008 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 73 matching lines @@
       return m_lastNodeInserted
                  ? &NodeTraversal::lastWithinOrSelf(*m_lastNodeInserted)
                  : 0;
     }
     Node* pastLastLeaf() const {
       return m_lastNodeInserted
                  ? NodeTraversal::next(
                        NodeTraversal::lastWithinOrSelf(*m_lastNodeInserted))
                  : 0;
     }
+    Node* refNode() const { return m_refNode.get(); }
+    void setRefNode(Node* node) { m_refNode = node; }
 
    private:
     Member<Node> m_firstNodeInserted;
     Member<Node> m_lastNodeInserted;
+    Member<Node> m_refNode;
   };
 
   Node* insertAsListItems(HTMLElement* listElement,
                           Element* insertionBlock,
                           const Position&,
                           InsertedNodes&,
                           EditingState*);
 
   void updateNodesInserted(Node*);
   bool shouldRemoveEndBR(HTMLBRElement*, const VisiblePosition&);
@@ skipping 46 matching lines @@
 
 DEFINE_TYPE_CASTS(ReplaceSelectionCommand,
                   CompositeEditCommand,
                   command,
                   command->isReplaceSelectionCommand(),
                   command.isReplaceSelectionCommand());
 
 }  // namespace blink
 
 #endif  // ReplaceSelectionCommand_h